Describe the Cucurbitaceae and Asclepiadaceae with the reference to the following features :
Leaf, inflorescence, flowers, androecium, gynoecium and floral formula.
Cucurbitaceae
Leaves:
Alternate, petiolate- petiole long and hollow; simple, lobed, exstipulate, palmately veined; tendrils present in the axil of leaf or opposite to the leaf. In Acanthosicyos the leaves are absent but thorns are present.
Inflorescence:
There is great variation in the inflorescence. Flowers are solitary, or racemose or cymose panicles (Actinostemma).
Flower:
Regular, mostly unisexual rarely bisexual (Schizopepon), incomplete, epigynous, small or large, mostly white or yellow, pentamerous.
Androecium:
Stamens 5, sometimes free or combined to form a central column, anthers dithecous extrorse, dehiscence longitudinal or in curves; androecium may be modified in one of the following ways:
1. In Thaldiantha two pairs of stamens are closely approximated in the lower part of their filaments and the fifth stands apart.
2. In Sincydium the pairs of stamens are united below; in Momordica, Citrullus, the union of pairs of stamens is complete and apparently only three stamens are present.
3. In Sicyos and Sechium the filaments unite to form
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